```css
/* ===== 全局变量 ===== */
:root {
  --primary: #f5a623;
  --primary-dark: #b05c1e;
  --primary-deep: #8b3f0c;
  --cream: #fff9f2;
  --cream-light: #fff5e6;
  --cream-dark: #fff0da;
  --text-main: #2d1b0e;
  --text-secondary: #4a2c16;
  --text-light: #3a2a17;
  --card-bg: #ffffff;
  --card-border: #f1d7b6;
  --shadow: 0 5px 15px rgba(0, 0, 0, 0.03);
  --shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.08);
  --radius-lg: 24px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --nav-height: 64px;
  --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
}

/* ===== 暗黑模式变量覆盖 ===== */
.dark-mode {
  --primary: #f3b06d;
  --primary-dark: #e07b39;
  --primary-deep: #ffbe76;
  --cream: #1f1309;
  --cream-light: #241a0f;
  --cream-dark: #2e2215;
  --text-main: #e7d7c0;
  --text-secondary: #f3d5af;
  --text-light: #dcc8ae;
  --card-bg: #2e2215;
  --card-border: #4e3c28;
  --shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  --shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.4);
}

/* ===== 基础重置 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-sans);
  background: var(--cream);
  color: var(--text-main);
  line-height: 1.7;
  min-height: 100vh;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

img, svg {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

.container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== 吸顶导航 ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--cream-light);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  padding: 12px 0;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: rgba(255, 245, 230, 0.92);
}

.dark-mode .navbar {
  background: rgba(36, 26, 15, 0.92);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.logo {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.3s ease;
}

.logo:hover {
  transform: scale(1.02);
}

.logo svg {
  width: 36px;
  height: 36px;
  filter: drop-shadow(0 2px 4px rgba(176, 92, 30, 0.2));
  transition: transform 0.5s ease;
}

.logo:hover svg {
  transform: rotate(15deg);
}

.nav-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  padding: 6px 8px;
  border-radius: 20px;
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--primary-dark);
  transition: width 0.3s ease;
  border-radius: 2px;
}

.nav-links a:hover {
  background: #ffd9a8;
  color: var(--primary-deep);
}

.dark-mode .nav-links a:hover {
  background: #3a2d1d;
}

.nav-links a:hover::after {
  width: 60%;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 5px;
  background: var(--card-bg);
  padding: 4px 12px;
  border-radius: 40px;
  border: 1px solid #eac58c;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(245, 166, 35, 0.15);
}

.dark-mode .search-box {
  background: #3a2d1d;
  border-color: #6b4e2c;
}

.search-box input {
  border: none;
  background: transparent;
  width: 130px;
  outline: none;
  padding: 4px;
  font-size: 0.9rem;
  color: var(--text-main);
}

.search-box input::placeholder {
  color: #999;
}

.dark-mode .search-box input::placeholder {
  color: #aaa;
}

.search-box button {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--primary-dark);
  transition: transform 0.2s ease;
}

.search-box button:hover {
  transform: scale(1.1);
}

.mobile-menu {
  display: none;
  font-size: 1.8rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 8px;
  transition: background 0.2s ease;
}

.mobile-menu:hover {
  background: rgba(245, 166, 35, 0.1);
}

@media (max-width: 768px) {
  .nav-links, .search-box {
    display: none;
  }
  .mobile-menu {
    display: block;
  }
}

.mobile-nav-open {
  display: flex;
  flex-direction: column;
  width: 100%;
  background: var(--cream-dark);
  padding: 10px 0;
  animation: slideDown 0.3s ease;
}

.mobile-nav-open a {
  padding: 8px 20px;
  border-bottom: 1px solid #f2d7ae;
  transition: background 0.2s ease, padding-left 0.3s ease;
}

.dark-mode .mobile-nav-open a {
  border-bottom-color: #4e3c28;
}

.mobile-nav-open a:hover {
  background: rgba(245, 166, 35, 0.1);
  padding-left: 28px;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 轮播 ===== */
.hero {
  background: linear-gradient(145deg, #fce5c8, #ffe8d0);
  border-radius: var(--radius-lg);
  margin: 25px 0;
  padding: 30px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(176, 92, 30, 0.1);
  transition: var(--transition);
}

.dark-mode .hero {
  background: linear-gradient(145deg, #2e2215, #3a2d1d);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 60%);
  animation: heroGlow 8s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes heroGlow {
  0% {
    transform: translate(0, 0) rotate(0deg);
  }
  100% {
    transform: translate(-20px, 20px) rotate(5deg);
  }
}

.hero-slide {
  display: none;
  animation: fade 0.5s ease;
}

.hero-slide.active {
  display: block;
}

@keyframes fade {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero h1 {
  font-size: 2.6rem;
  color: var(--primary-deep);
  margin-bottom: 12px;
  font-weight: 800;
  line-height: 1.2;
  text-shadow: 0 2px 10px rgba(255, 255, 255, 0.3);
}

.dark-mode .hero h1 {
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero p {
  font-size: 1.2rem;
  max-width: 600px;
  color: var(--text-light);
  opacity: 0.9;
}

.hero .btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary-dark), #c4702e);
  color: white;
  padding: 10px 28px;
  border-radius: 40px;
  text-decoration: none;
  margin-top: 18px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(176, 92, 30, 0.3);
  position: relative;
  overflow: hidden;
}

.hero .btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s ease;
}

.hero .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(176, 92, 30, 0.4);
}

.hero .btn:hover::after {
  left: 100%;
}

.hero-indicators {
  position: absolute;
  bottom: 15px;
  right: 30px;
  display: flex;
  gap: 8px;
  z-index: 2;
}

.hero-indicators span {
  width: 10px;
  height: 10px;
  background: #b98a5a;
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
}

.dark-mode .hero-indicators span {
  background: #7a5a3a;
}

.hero-indicators span.active {
  background: var(--primary-deep);
  transform: scale(1.3);
  box-shadow: 0 0 8px rgba(139, 63, 12, 0.4);
}

/* ===== 节标题 ===== */
.section-title {
  font-size: 2rem;
  margin: 40px 0 25px;
  border-left: 8px solid var(--primary-dark);
  padding-left: 20px;
  color: var(--text-main);
  position: relative;
  transition: var(--transition);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 20px;
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), transparent);
  border-radius: 2px;
}

/* ===== 网格布局 ===== */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 25px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
}

@media (max-width: 992px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* ===== 卡片 ===== */
.card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 25px;
  box-shadow: var(--shadow);
  border: 1px solid var(--card-border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}

.card:hover::before {
  transform: scaleX(1);
}

.card h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
  color: var(--text-main);
  transition: color 0.3s ease;
}

.card h4 {
  font-size: 1.1rem;
  margin: 15px 0 8px;
  color: var(--text-main);
}

.card p {
  color: var(--text-light);
  opacity: 0.9;
  margin-bottom: 8px;
}

.card p:last-child {
  margin-bottom: 0;
}

/* ===== 产品优势列表 ===== */
#products ul {
  margin-top: 15px;
}

#products ul li {
  padding: 8px 0 8px 28px;
  position: relative;
  transition: padding-left 0.3s ease;
}

#products ul li::before {
  content: '🥟';
  position: absolute;
  left: 0;
  top: 8px;
  font-size: 1.1rem;
  transition: transform 0.3s ease;
}

#products ul li:hover {
  padding-left: 32px;
}

#products ul li:hover::before {
  transform: rotate(20deg) scale(1.2);
}

/* ===== 文章列表 ===== */
.article-list li {
  margin-bottom: 12px;
  list-style: none;
  border-bottom: 1px dashed #d2a06d;
  padding-bottom: 8px;
  transition: var(--transition);
  padding: 10px 15px;
  border-radius: 12px;
  background: transparent;
}

.dark-mode .article-list li {
  border-bottom-color: #4e3c28;
}

.article-list li:hover {
  background: rgba(245, 166, 35, 0.05);
  border-bottom-color: var(--primary);
  padding-left: 20px;
}

.article-list a {
  font-weight: 500;
  font-size: 1.05rem;
  transition: color 0.3s ease;
}

.article-list a:hover {
  color: var(--primary-dark);
}

.article-list time {
  font-size: 0.85rem;
  color: #999;
  margin-left: 10px;
}

.article-list p {
  font-size: 0.9rem;
  color: var(--text-light);
  opacity: 0.8;
  margin-top: 5px;
}

/* ===== FAQ ===== */
.faq-item {
  background: var(--card-bg);
  padding: 15px 20px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  border: 1px solid var(--card-border);
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--primary);
  box-shadow: 0 3px 12px rgba(245, 166, 35, 0.1);
}

.faq-question {
  font-weight: 700;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.05rem;
  transition: color 0.3s ease;
}

.faq-question span {
  font-size: 1.4rem;
  transition: transform 0.3s ease;
  color: var(--primary-dark);
  font-weight: 400;
}

.faq-item.open .faq-question span {
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding-top: 10px;
  color: var(--text-light);
  line-height: 1.8;
  border-top: 1px dashed rgba(210, 160, 109, 0.4);
  margin-top: 10px;
  animation: fadeIn 0.3s ease;
}

.faq-item.open .faq-answer {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== HowTo 盒子 ===== */
.howto-box {
  background: var(--cream-light);
  border-radius: var(--radius-lg);
  padding: 30px;
  border: 1px solid #eccb90;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.dark-mode .howto-box {
  background: var(--card-bg);
  border-color: #4e3c28;
}

.howto-box::before {
  content: '📖';
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 3rem;
  opacity: 0.1;
  transform: rotate(15deg);
}

.howto-box p {
  margin-bottom: 10px;
}

.howto-box ol {
  margin: 15px 0;
  padding-left: 20px;
}

.howto-box ol li {
  margin-bottom: 8px;
  position: relative;
  padding-left: 10px;
  transition: padding-left 0.3s ease;
}

.howto-box ol li:hover {
  padding-left: 15px;
}

.howto-box ol li::marker {
  color: var(--primary-dark);
  font-weight: bold;
}

/* ===== 统计数字 ===== */
.stat-number {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--primary-dark);
  line-height: 1.2;
}

/* ===== 页脚 ===== */
.footer {
  background: #2d1b0e;
  color: #e7cba9;
  margin-top: 60px;
  padding: 40px 0 20px;
  position: relative;
}

.dark-mode .footer {
  background: #0e0904;
}

.footer a {
  color: #f3c58f;
  text-decoration: none;
  transition: color 0.3s ease, opacity 0.3s ease;
}

.footer a:hover {
  color: #ffd9a8;
  opacity: 0.9;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 25px;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer h4 {
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: #f3c58f;
  position: relative;
  padding-bottom: 8px;
}

.footer h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.footer p {
  font-size: 0.95rem;
  line-height: 1.8;
  opacity: 0.9;
}

/* ===== 返回顶部 ===== */
.backtop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: linear-gradient(135deg, #c4702e, var(--primary-dark));
  color: white;
  width: 45px;
  height: 45px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.5rem;
  box-shadow: 0 5px 12px rgba(0, 0, 0, 0.2);
  transition: var(--transition);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

.backtop.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.backtop:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 20px rgba(176, 92, 30, 0.4);
}

/* ===== 暗黑模式切换按钮 ===== */
.dark-mode-toggle {
  position: fixed;
  bottom: 85px;
  right: 30px;
  background: linear-gradient(135deg, #b05c1e, #c4702e);
  color: white;
  width: 45px;
  height: 45px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.3rem;
  box-shadow: 0 5px 12px rgba(0, 0, 0, 0.2);
  transition: var(--transition);
  z-index: 999;
  border: none;
}

.dark-mode-toggle:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 20px rgba(176, 92, 30, 0.4);
}

/* ===== 滚动动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 响应式优化 ===== */
@media (max-width: 768px) {
  .hero {
    padding: 20px;
    margin: 15px 0;
  }
  
  .hero h1 {
    font-size: 1.8rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 1.5rem;
    margin: 30px 0 20px;
  }
  
  .card {
    padding: 20px;
  }
  
  .container {
    padding: 0 15px;
  }
  
  .hero-indicators {
    right: 20px;
    bottom: 10px;
  }
  
  .backtop, .dark-mode-toggle {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
    right: 15px;
  }
  
  .dark-mode-toggle {
    bottom: 70px;
  }
}

@media (max-width: 480px) {
  .logo {
    font-size: 1.4rem;
  }
  
  .logo svg {
    width: 28px;
    height: 28px;
  }
  
  .hero h1 {
    font-size: 1.5rem;
  }
  
  .hero p {
    font-size: 0.9rem;
  }
  
  .hero .btn {
    padding: 8px 20px;
    font-size: 0.9rem;
  }
  
  .section-title {
    font-size: 1.3rem;
    padding-left: 15px;
  }
}

/* ===== 打印样式 ===== */
@media print {
  .navbar, .footer, .backtop, .dark-mode-toggle, .hero-indicators {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .card, .howto-box, .faq-item {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(245, 166, 35, 0.05);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary), var(--primary-dark));
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}

/* ===== 选择颜色 ===== */
::selection {
  background: rgba(245, 166, 35, 0.3);
  color: var(--text-main);
}

/* ===== 焦点可见性 ===== */
:focus-visible {
  outline: 3px solid rgba(245, 166, 35, 0.5);
  outline-offset: 2px;
}

/* ===== 动画性能优化 ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}
```